Our partners at the University of Colorado have develpoed interactive data browsers that allow users to explore and download grid-point to basin-level GRACE data. Two data browers are currently operational:
This interface provides GRACE data over land, derived from Level-2 spherical harmonic coefficients. The UC GRACE data is processed similarly as the GRACE Tellus gridded land data: the data have been destriped and smoothed, and are optimal for land hydrology applications. The CU GRACE browser allows the user to choose a range of spatial smoothing radii, whether or not to apply destriping, and provides the most recent RL05 solutions from JPL, CSR, and GFZ. User can choose to retrieve time-series for global river basins (based on TRIP basin boundaries, or USGS Pfafstetter levels). Seasonal and trend estimates over land are also available.
This interface provides interactive access to the JPL-Mascon fields. Each individual mascon pixel can be evaluated. To use the Mascon Visualization Tool, simply select a location by clicking on the map on the main page or by inputing latitude and longitude coordinates into the form next to the map. After selecting a mascon on the map, the tool will retrieve a timeseries for that mascon and plot it below. A slider at the bottom of the plot lets you select the timeframe over which data is plotted, as shown in the image below. Radio buttons at the right allow you to enable or disable plotting the best fit trend overtop the data, and also allow you to de-season the data. De-seasoning removes annual and semi-annual signals from the timeseries, as well as a 161-day aliasing signal that results from GRACE's orbit design. Best fit parameters are estimated for the selected time interval - changing the interval will change the fitted parameters.